Done, already tried another battery that shows 100% in another phone and same issue.
It could be a hardware issue? I know it could be, but it doesnt sounds as... its really weird, everything works just prefectly fine, everything, but it keeps saying that the battery is at "0%" and it turns off after a few minutes, if I plug the phone into the charger it doesnt turns on, and as I said, it also charges the battery, but anyway it doesnt shows it.
Make your guess...
In the meantime I'll try to reflash again and use one of those custom battery metters, never tried them before, so it may sound as I doesnt know what am I saying... guess what... you're right, but better try
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Suggestions are welcome!!!
Thanks a lot for reading!.